Metal-working machine



'3. E. FLANDERS.

METAL WORKING MACHINE.` APPLIcATloN FILED Dic* 3 l, |919.

Patented Feb. l5, 1921.

2 SHEE S- SHEEI 2.

RALPH E. MANDERS, or srmNerIELn, VERMONT,

MACHINE COMPANY, MONT.

PATENT ASSIGNOR TO JONES LAMSON OF SPRINGFIELD, VERMONT, A CORPORATION OF VER- METAL-WORKING MACHINE.

Specification of Letters Patent.

Application led December 31, 1919. Serial No. 348,518.

State of Vermont, haveinvented newl and useful Improvements in Metal Working Machinesf which the following is a speci- I, ication.

The present invention has relation to spindles, such as employed in lathes, for` centering and rotating the work to be operated o n 'by the tools. It is necessary or desirable torprovide the spindle with means for centering and holding detached piecesof work of different conformations, such as work arbors, bars, ear blanks, and the like, some of which are eld between centers and -others of which are held in -a chuck. The

spindle therefore should beso constructed as to hold a center pin, an arbor or a chuck, as may be desired, in proper axial alinement with the spindle. This is accomplished in accordance with the present invention, by providing a tapering recess in the end of the spindle and employing therein a completaper, to receive either a tapered center or center pin', or the tapered end of av work arbor. The bushing projects from the end ofthe spindle and -1ts projecting end is cylindrical, so as to locate centrally'either the."

drive plate by which the' arbor.is rotated or else. the chuck. Other details of a spin, dle illustrated as embodying the invention will be described in connection with the acj companying drawings, of which arb Figure 1 illustrates the spindle in section, and shows its head end as engaged with an Fig. 2 represents a plan view, partially in section of some of the parts shown in Fig. 1.

Fi 3 represents a front view of the arbor.

. thereby the the spindle prevente provided with driving members to drive the arbor.

- The same reference characters indicate the same parts wherever used throughout the drawings.

12 represents the head stock of the ma- Patented Feb. 15, 19211. 4

chine, 13 the tail'stock, and 14 the article to be wrought upon. 15 represents a spin- -dle for revolving the workand 16'the gear fastened to the spindle. this gear, are other means connecting it with a source of power not shown, whereby thespindle 15 is revolved. Gear 16, keyed to spindle 15, is held against the shoulder 151 by means of screws 17.

Adjacent the gear wheel 16 is a ball-thrust bearin 18, the race rino` 19 thereof abutting the hu of gear 16, and the other race ring Cooperating with Gears or equivalentv 20 having its rear face spherically rounded at 21. lCoperating with the spherical face of `race ring 20 is an adjusting ring 22, having a beveled face. The adjusting ring is externally 'screw threaded at the end opposite the beveled face to coperate with the mental bushing which has a double internal internal screw threads of a collar 23, which abuts a shoulder 24 on the head stock. It is apparent from this construction that tightening or loosening of the thrust bearing against the gear wheel may be accom` plished by rotating 'collar 23 on rin'g 22, and gear wheel is thrust against shoulder 1.51 of the spindle and wear is compensated for and lon itudinal lost motion of The head end of the spindle 15 is recessed at 25 and adjoining said recess and forward end thereof the bore of the spindle is gradually tapered outwardly through the head 251. A bushing 26 of hardened steel is exteriorly tapered to fit the tapered bore of the spindle and projects a short distance beyond the end of the spindle.- This projecting porthe tapered end 32 of the head 33 of thev work arbor 31.

vfor a purpose to be described.

To the rear of the head, the arbor 31 comprises a series of cylindrical portions 34, 35, of different diameter to conform to gear blanks and the like of various internal diameters, to be wrought upon. The arbor head is provided with a cylindrical bore 37 transverse of its axis and adapted to receive a cylindrical swivel pin 38. The swivel pin is provided midway of. its length with a circumferential groove 39. Seated in a socket in the head 33 at right angles to and opening into the bore 37 is a spring pressed pin 40;

said pin being shaped-at one end to fit in thel groove 39 of the swivel pin. y4l indicates an opening through which pin 40 may be inserted. The pin 40 projecting into the groove 39 prevents longitudinal movement of pin 38 with respect to thel bore 37 and at the same time permitssaid pinto vrotate invsaid bore.

On opposite sides of pin 38 are flattened faces adjacent its ends at 42 and 421. These faces do not lie .in parallel planes, but are in planes which converge as shown in Fig. 2,

The cylindrical portion 27 of bushing 26 is adapted to form a pilot for centering a driving plate 43 carrying-'either a chuck or else members for drivlng a work arbor. The drive plate has a projection which 'is centered on the cylindrical end 27 of bushing 26. The spindle 15 has at its head end an outstanding flange 47, and fastened to said flange is a key or block 49 made of hard steel 50 operates to draw the driving plate against so as to resist wear and strain and which is adapted to fit in a socket or recess 48V-in the drive plate. Mounted to surround the cylindrical projection 44 is a collar 50 having an inturned flange 51 at one end adapted to abut against the inner face of the flange 47. 'The internal opposite end of the collar 50`is screw threaded to coperate with the screw threads on the member 43. The collar the head end of the spindle, and the key- 49 fitting into notch 48 prevents the drive plate from rotating relative tothe spindle, when the driveplate is so drawn into place.

Ihe driving plate may be provided with drlvlng members which are disposed at diametrically opposite sides of the spindle axis,

and which are utilized together wlth a transverse swivel pin on the work arbor, in imparting a balanced drive to the latter. These members, in the construction shown in Fig. 2, consist of segments 461, 461, formed by notchlng a iiange on the drive, plate as shown at 46. The segments, in this case, have Hat end faces as shown, to engage the flattened ends of the swivel pin as will be described. If desired, however, these drive members may consist of studs 462 projecting from the face of the drive plate, as shown in-Fig'. 11. In either case, when the spindle has rotated slightly or far enough for one of the driving members to engage the end of the pin, the latter rotates until its other end engages the other member, whereupon both members bear with the same pressure against the pin, and power is thus applied equally on diametrically opposite sides of the arbor'. In this operation, because of the fact, that the faces on the pin are in convergent planes,

when one of the members comes in contact with one end of the in, it engages an edge or corner thereof an rotates the pin about its axis, and, before the pin has been rotated far enough for the member to bear across the entire face of .the pin, the edge or corner at the other end of the pin enga es the other member. l i.

ithout the employment of a pin which 'can rotate on its own axis as herein described, one end ofthe pin would be outofcontact with its complemental drivmg member and the force would be exerted all at onevend of the pin, with' the possibility of decentralizing the arbor in' respect of the spindle and loosening the connection between the arbor and the spindle; while by the above .construction these objections .are

avoided.

Instead of the arbor and drive plate it ma be desirable to use a chuck such as is illustrated at 52 in Figs. 9,' 10 and 11. Such a chuck may be provided with a back or drive plate 53'centered on the cylindrical end 27 of the bushing 26, and held flush against the face of the flange 47 by means of collar 50.

The bushing 26, because of itscylindrical end portion and the double tape'r of its bore,

is adapted to'center and hold in place either va center pin for use in holding bars or the like, a work arbor adapted for -holding pulleys or gea-r blanks, a drive plate for use -with the arbor, or else a chuck adapted' for use with still a different class of work.

By supporting a work arbor, such as shown in Fig. 6, with the beveled end 32 1n' the tapered end 29 of the bushing, I am able to secure a much stiffer support for the arbor than when it is mounted in both ends in center pins in the usual way. `This permits the taking. of heavier cuts with less chatter Aand destruction of the cutting edges on the tools. f Thus the improvement herein described, adds materially to the quantity and quality of the work produced by the.

tapered bore, a bushing seating in said ta' attempting to set forth all ofthe forms in which it may me made or all of the modes of its use, what I claim is 1. In .combination with a spindle having a bore tapering outwardly, a bushing having a tapered portion adapted to fit the tapered bore of the spindle, said bushing having two internal tapers of different angles to the axis of the bushing and a portion projecting beyond the spindle.

2. In combination with a spindle having a pered bore and havinga cylindrical portion extending beyond the end of said spindle and having two internal tapers whereby said bushing is adapted to ycenter a drive plate, a work arbor or a center pin and thereby adapt the machine for a variety of work.

3. In combination with aspindle, a drive plate attached thereto for rotation therewith, members projecting from one face of the drive plate and located on opposite sides of the axis thereof, a work arbor centered' with respect to said drive plate, a pin transversely mounted in one end of said arbor and having fiat-faced ends, and driving members on said drive plate for engaging the fiat faces of said pin to secure a balanced drive of said arbor.

4. In combination with a spindle, a drive plate attached thereto for rotation therewith, a work arbor centered with respectto sald drive plate, a swiveling pin mounted in one end of the arbor adjacent said driving element and having faces lying in converging planes andmembers on said driving element for engaging said faces, whereby when the spindle rotates, one of said members will contact with the corresponding flat face and rotate the pin until the other member contacts with the corresponding fiat face, and a balanced drive is obtained.

5. In combination with a spindle having a conical bore in one end thereof, a bushing having a conical portion adapted to seat in said conical bore, acylindrical portion projectlng beyond said spindle and a conical bore, a drive plate centered on the cylin- L drical portion of the bushing and attached to the end of the spindle for rotation therewith, said drive plate having diametrically opposlte driving members, a work arbor having a conical portion centering inthe conical bore ofthe bushing, and having a transversey cylindrical .swiveling pin, said pin having flattened faces adjacent its ends lying in converging planes and adapted to be respectively engaged by said driving members, whereby said arbor is centered in respect of the spindle and a balanced drive l thereof is obtained.

6. 'In combination with a spindle, a drive plate mounted thereon to rotatetherewith and having diametrically opposite driving members, an arbor having a head thereon centered in said spindle, a swiveling pin mounted` transversely. in said head, and means for preventmg longitudinal movement of the transverse pin andpermitting rotary movement thereof the ends of the pin having flat faces on opposite sides thereof lying in coverging planes, and adapted to be engaged by said driving members in such manner as to impart a balanced drive to the arbor from the spindle.v

7. A work arbor adapted to be centered in alathe spindle and to be driven thereby, said arbor having a transverse pin journaled therein'withlfaces at its `ends adapted for engagement with spaced driving members on the spi-ndle, certain of said faces being arranged inA converging planes whereby a balanced drive is obtained when the spindle is rotated. l

8. A work arbor having a head at one end adapted to engage a spindle, a transverse pin journaled in said head, and means forl holdlng' said in against endwlse movement, said pin havlng at its ends flat faces arranged in convergent planes substantlally as described.

9. A work arbor adapted to be centered in a lathe spindle and to be driven.y thereby, said arbor having a transverse pin, journaled therein, driving members on the spindle, fiat surfaces on the ends of the transverse pm,4

and surfaces on the driving members, adapted to be brought into contact with the surfaces on the driving members, certain of said surfaces being inclined in converging planes whereby a balance drive isobtained. s

10. In combination with a spindle having va bore tapering outwardly, a bushin hav- 

